Fastener for sash-cords.



J. D. C. KNAPP.

FASTENER FOR SASH CORDS.

APPLICATION men OCT. n. 1915.

1 1 90, l 77 Patented July 4, 1916.

UNITED STATES PATENT oniuen.

JOHN D. C. KNAPP, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO JOHN C. BROWN, OF

DULUTH, MINNESOTA.

FASTENER FOB SASH-CORDS.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed October 11, 1915. 'Serial No. 55,159.

To all whom it may concern:

Be it known that I, JOHN D. C. KNAPP,

a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Fasteners for Sash-Cords, of which the following is a specification.

My invention relates to fasteners for sash cords and has for its object to provide a fastener at each end of a window cord, one of which forms a thimble for attaching the counterweight and for securing the cord thereto without the use of knots, and the other of which forms a pronged button for attachment to the sash. and also serves to secure the other end of the cord thereto without the use of knots.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In the drawings, illustrating the application of my invention in one form,Figure 1 is a longitudinal sectional elevational view: of a portion of a window frame. and sash showing the regular window cord and counterweight with my fastenersapplied thereto. Fig. 2 is a front elevational view of one of the fasteners employed at the sash end of the cord prior to the application of the same. Fig. 3 is a side elevational view of the cord with the fastener shown in Fig. 2 attached thereto. Fig. 4 is a modification of the device shown in Fig. 3. Fig. 5 is an elevational view of one of the fasteners employed at the counterweight end of the cord prior to the application of the same. Fig. 6 is a side elevational view of the cord and counterweight with the fastener shown in Fig. 5 attached thereto. Fig. 7 is an enlarged sectional view taken on line 77 of Fig. 4. Fig. 8 is an enlarged sectional view taken on line 8-8 of Fig. 6. Fig. 9 is a View of the cord fastening member partly closed.

My window cord fasteners are readily adapted to application with the window frames and sash of ordinary construction, as shown in Fig. 1, where a counterweight 10 slides betwen the window frame 11 and the wall stud 12 and is attached to one end 13 of a cord 14 which passes over a pulley '15 secured in the casing 11, and is attached at its other end 16 to a window sash 17 The fasteners are all punched out of sheet metal in the forms shown in Figs. 2 and 5. The fasteners shown in Fig. 2 have a stem portion 18 which is provided at one end with a circular head 19 from which issue a number of prongs 20, bent outward from head 19 as shown in Fig. 3. At the opposite end of stem 18 are a number of rectangular wings 21 and 22 which issue oppositely from both sides of stem 18 and are separated by spaces 23 of a width a trifle greater than that of the wings 22 and 21. Each of the wings 21 and 22 is provided with a small sharp triangular barb 24 punched out of the body of the fastener, as shown in detail in Fig. 7. The application of this fastener is clearly shown in Figs. 1 and 3. The wings 21 and 22 are bent about the end 16 of cord 14 with the barbs 24 pointing inwardly, thus clench ing the cord and securely attaching the fastener thereto. The pronged head 19 is of such a size that it just passes into the circular hole 25, with which all sash are equipped,

and when the same reaches the bottom of the hole 25 and is given a blow with a hammer the prongs 20 straighten out and hold head 19 in place within said hole, allowing the cord 14 to fall in the usual groove 26,

as clearly shown in Fig. 1.

The fastener employed at the counter weight end of the cord is shown in Fig. 5 and is quite similar to that shown in Fig. 2. It is also punched out of sheet metal which leaves a stem 27 provided at end 33 with wings 28 and 29, and at end 34 with wings 30 and 31, said wings being similarly spaced and equipped with barbs 32. The application of the same is well shown in Figs. 6'

and 8. Stem 27 is bent and curved to form a thimble 34 around which the end 13 of cord 14 is passed. The wings 28 and 29 are bent backward between the wings 30 and 31 to clench the end 13 of the cord and the portion 34 of the fastener together, and in In case the fastener shown in Fig. 3'

proves to be too flexible I employ the form shown in Fig. 4, which is not so advantageous in that it has one less prong and is more expensive to make. In this form a double head is used comprising portions and 36 which are, respectively, provided with-prongs 37 and 38. From heads 35 and 36 issue stems 39 and 4L0 at the end of which are barbed wings ll and 42. The whole is punched out of one piece of metal, the heads being fastened together and folded over each other at 43. Stem 4-0, it will be noted, is shorter than stem 39, so that wings 42 fit in the spaces between wings tl, and vice versa, making the same firmly grip and hold the cord attatched thereto. The two stems 39 and being spread, as indicated, greatly stiifens the device and holds the cord more securely in place within the groove 26.

i The advantages of my invention are manifest. The fasteners are simple and easy to make. They are readily attached to the cord and the sliding parts by the simple use of a hammer, eliminating the use of knobs or other clumsy expedients, and yet giving a firm hold on the parts gripped. They also take up the wear which would otherwise be given to the cord, thus prolonging the life of the same.

I claim:

1. A sash cord fastener comprising a metallic member having a looped portion extending through the sash weight and receiving a corresponding loop of the cord, the two ends of said member having oppositely Copies oi this patent may be obtained for extended barbed wings, the wings of one end alternating with those of the other and being adapted to engage with their barbs the strands of cord at each side of the member and fasten the loop.

2. A sash cord fastener comprising a metallic member having a looped portion extending through the sash weight and receiving a corresponding loop of the cord, the two ends of said member having oppositely extended barbed wings, the wings of one end alternating and interlocking with the wings of the other to engage with their barbs the strands of the cord at each side of the other stem embracing the first stem and the other end of the cord.

In testimony whereof I aiiix my signature in presence of two witnesses. JOHN D. C. KNAPP.

Witnesses F. A. VVI-IITELEY, H. A. BOWMAN.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. i 

